The first step a social worker can take in resolving countertransference is to:​

A) ​engage in introspection.
B) ​discuss with the client.
C) ​suppress all forms of thought.
D) ​seek professional help.

The best step a social worker can take in resolving countertransference is to engage in introspection. This involves reflecting on personal reactions and feelings towards the client and examining why those reactions may be present. By doing so, the social worker can gain self-awareness and work towards managing their own emotions and biases in the therapeutic relationship. Discussing with the client or suppressing all forms of thought may not be appropriate or effective responses, and seeking professional help may be necessary in some cases but is not the first step.